Alanine aminotransferase, also known as alanine aminotransferase, is still within the normal range as low as 7 U/L and has no special clinical significance. Alanine aminotransferase is mainly found in hepatocyte plasma, once 1% of hepatocytes are destroyed, serum alanine aminotransferase concentration can be doubled, and it is the most sensitive indicator of liver function damage. The normal range of ALT is 5-35 U/L for women and 5-40 U/L for men, so an ALT of 7 U/L is within the normal range and has no special clinical significance. On the contrary, if the alanine aminotransferase is elevated, it suggests that there may be chronic viral hepatitis, cirrhosis, cholecystitis and other liver and gallbladder diseases, dermatomyositis, renal infarction, pancreatitis and other diseases and taking certain hepatotoxic drugs, such as isoniazid, rifampicin and so on. No special treatment is needed in the presence of AST 7 U/L, but you need to go to the hospital and ask your doctor to make a judgment if you have an elevated AST.